Model test study on simply supported beam bridge model crossing strike-slip fault
A set of experimental apparatus capable of simulating the relative three-dimensional motion between two fault plates was designed and manufactured according to the test function and model parameter require-ments to investigate the causes and failure modes of the repeated"beam falling"seismic damage of simply supported beam bridges under earthquakes(active faults).Taking a simply supported beam bridge crossing a strike-slip fault as the research object,the damage process under fault action was studied through model tests,and the failure characteristics and structural failure modes of girder falling were analyzed.The results show that the bearing arrangement significantly affects the girder falling behavior,and the processes such as main girder movement and tilting can aggravate the damage of bridge piers and may induce further collapse of bridges;the fault dislocation causes the soil compression effect,causing a general increase in earth pressure in the near-fault zone,while the earth pressure changes in the side-span zone are relatively small,and the earth pressure chan-ges at different depths of pile foundations exhibit a specific order.The data and conclusions obtained from the experiments can provide experimental references for subsequent research and help guide future seismic design and fault-adaptive design of structures.
万方数据
维普
